Following lengthy discussions with palace aides, they were told that once they stop carrying out duties on behalf of the Queen, they can no longer use the brand name “SussexRoyal” because of government rules.

Meanwhile, one person with an idea of a future title the Queen’s grandson going forward is Jon Bon Jovi, who is collaborating with Harry to produce a charity single for military veterans.

The Rock legend told talkRADIO’s Julia Hartley-Brewer he had wondered what to call the duke but had settled on “the artist formerly known as Prince”.